Fastener driving and furring tool for stucco-netting and the like



Oct. 18, 1966 D. P. M KEE FASTENER DRIVING AND FURRING TOOL FOR STUCCO-NETTING AND THE LIKE 5 Sheets-Sheet 1 Filed June 25, 1964 INVENTOR.

041: F1 Mz/fss BY Oct. 18, 1966 D. P. M KEE 3,279,672 FASTENER DRIVING AND FURRING TOOL FOR S'I'UCCO-NETTING AND THE LIKE Filed June 25, 1964 5 Sheets-Sheet 2 /5-'-' /5 w v U INVENTOR DALE F1 Maia? A auvr Oct. 18, 1966 P. MOKEE 3,279,672

FASTENER DRIVING AND FURRING TOOL FOR STUCCO-NETTING AND THE LIKE Filed June 25, 1964 I 5 Sheets-Sheet 5 A30 27 I96 Z 6/ 2f X M /ZO A25 //3 423 22 A25 zs zvr United States Patent 3,279,672 FASTENER DRIVING AND FURRING TOOL FOR STUCCO-NETTING AND THE LIKE Dale P. McKee, Woodland Hills, Califi, assignor to Powers Wire Products Company, Inc., El Monte, Calif., a corporation of California I Filed June 25, 1964, Ser. No. 377,820 Claims. (Cl. 227-77) This invention relates to a fastener driving tool and it is particularly concerned with a tool that drives fasteners and simultaneously furs the article being attached by said fasteners, to lift said article to a predetermined level spaced from the surface to which it is to be attached, and further to secure said article in said predetermined levelled position by driving the fasteners into the said surface and simultaneously into positioning engagement with said article.

This invention, in its broad sense, is applicable to many situations where it is desirable to fasten an article on and in spaced relation to a surface. One very practical appli cation of the invention is the furring of stucco-netting employed in the underlying foundation structure of plastered walls and the like. Therefore, the present invention will be hereinafter described as it is embodied in installation of stucco-netting as an article to be fastened in place at a predetermined level spaced from the surface to which it is attached by the instant fastener driving tool.

Exterior building walls of frame constructions that are plastered with cement are known as stucco walls. This type of wall involves the erection of a frame which is covered with a membrane of construction paper over which the exterior stucco is applied. This particular construction is to be distinguished from lath and plaster construction, since it has acquired a status of being substantially heavier and more durable as the exterior envelope of a building. Generally, the wall consists of vertically disposed studs S that are spaced at predetermined and uniform intervals, of tie wires W laced horizontally across the outer faces of the studs, of construction paper P applied to the faces of the studs and over the tie wires, and of stucco-netting N fastened on and spaced from the faces of the studs in spaced relation to the said faces and to the said paper. The important feature is the predetermined spacing of the stucco-netting; say for example A inch from the faces of the studs 8- and an equal spaced distance from the surface of the construction paper P. With this specified spacing of the stucconetting from the studs and paper, it is permissible to apply the scratchcoat of cement, to which the overlying stucco cement is then applied.

Construction codes strictly control the procedure of insuring proper furring and/or spacing as set forth above, and it is this levelling of the stucco-netting which ordinarily involves considerable time and effort and constant concern. And, heretofore this furring has been etfected by specially headed nails with underlying felt blocks and the like, all applied by use of the classic hammer method. Further, proper suspension of stucco-netting by use of nails with underlying felt blocks requires controls over the exact placement of said nails as suspension fasteners, and this is time consuming and a factor to be considered.

The primary object of the present invention is to provide means associated with a fastener driving tool, to lift an article a predetermined distance from a surface to which said article is then fastened.

It is an object of this invention to provide a fastener driving tool that places a fastener in engagement with an article in such a fashion as to hold said article in spaced relation to the surface from which it is supported.

Another object of this invention is to provide a tool that spaces an article from a surface and that applies a ice fastener in such a fashion as to urge the article into predetermined spaced relation to said surface.

It is still another object of this invention to provide a fastener driving tool of the character referred to and wherein features are included in the head thereof and associated with the fastener guideway thereof, to engage and lift an article to a predetermined level prior to the driving of a fastener through the guideway and into engagement with the said article in order to apply the article to a surface from which it is required to be spaced.

This application is copending with application Serial No. 377,967, filed on June 25, 1964, and entitled, Method of and Fastener for Furring Articles From a Supporting Surface.

The various objects and features of this invention will be fully understood from the following detailed description of the typical preferred forms and applications thereof, throughout which description reference is made to the accompanying drawings, in which:

FIG. 1 is a perspective view showing the furring tool of the present invention as it is related to an article prior to lifting of said article away from the surface to which is is attached by said tool, when operated to drive a fastener into the said surface and into engagement with said article.

FIG. 2 shows the development of typical fasteners that are applied by the tool of the present invention, these fasteners being indicated as a, b and 0.

FIG. 3 is an enlarged view of the preferredform of fastener that is applied by the particular tool hereinafter described,

FIG. 4 is a detailed sectional view of a fastener driving and article furring tool as provided by the present invention.

FIG. 5 is an enlarged sectional view taken as indicated by line 55 on FIG. 1.

FIG. 6 is a view taken as indicated by line 66 on FIG. 5.

FIGS. 7 through 10 are detailed views of the head elements which characterize the tool, FIG. 7 being taken substantially as indicated by line 77 on FIG. 4 and showing the inactive position of said elements, FIG. 8 showing a partial movement of said elements, FIG. 9 showing a full movement of said elements, and FIG. 10 showing driving of a fastener.

FIG. 11 is a view similar to FIG. 8 and shows partial movement of the single element of a primary form of the invention. I

The type of structure to which this invention appertains is briefly set forth above and which involves a frame construction comprising studs S upon which the tie wire W is laced, covered 'by construction paper P, and over which stucco-netting N is applied. This construction is the underlying foundation that is erected for the support of the cement coating or coatings known in the building trades as stucco. The characteristic features of stucconetting are that it is an article made of relatively soft wire 10, usually galvanized, and arranged to form a mesh that can be applied in flat sheets supplied from rolls. It is common for this article to comprise a plurality of wires 10 extending longitudinally of the sheet of netting, these wires being turned or bent alternately from side to side and roped together as at 12. Thus, the characteristic pattern of the mesh is that adjacent hexagons are established with opposite parallel sides disposed longitudinally of the sheet and roped together, as shown. It is apparent, then, that the roped portions at 12 are stiffened and of increased cross section. The roping comprises two oppositely pitched, or oppositely twisted, helixes that merge at the center of the sides which are roped together.

In accordance with this invention fasteners in the form of staples or the like are driven by the tool T which I through the head thereof,

modify with the provision of means at the head thereof to specially drive said staples. The staples can vary in exact shape and formation, three general types of fasteners being illustrated in FIG. 2, a, b and c. In FIG. 2a the fastener has parallel shanks and is U-shaped to engage over the article to be fastened and furred. In FIG. 2b the fastener is U-shaped and has an extended head portion that frictionally engages the article to be fastened and furred. And, in FIG. 2c I have shown the preferred fastener F which is essentially a U-shaped staple but with a centrally extended head portion of looped "formation and which is constricted or clinched onto the article so as to positively hold said article in spaced relation to a supporting surface. With the example fastener shown in FIG. 2a the driving tool T is to be provided with driver blade stop means (not shown) in order to limit the depth to which the fasteners are driven. However, with the fasteners shown in FIGS. 2b and 2c the first turn of the staple body presents a stop shoulder that engages the supporting surface to limit the depth to which the fasteners are driven.

In FIG. 3 of the drawings I have shown the initial for mation of the staple fastener F and which comprises a pair of parallel shanks 15 integrally joined by a transverse head 16. The head 16 is unique in that it has inclined shoulder portions 17, preferably inclined upward and outward, and in that it has a vertically disposed and centrally located loop portion 18 joining the two inclined shoulder portions. Relatively sharp turns are provided at the points of joinder with the shanks and loop portion respectively, and the top of the loop per se is uniformly turned about a constant radius and the sides 19 of the loop are initially parallel, as shown, and upon actuation of the tool T the shoulder portions 17 are straightened into horizontal alignment with each other and whereupon the loop portion 18 is thereby constricted to the condition clearly shown in FIGS. 2c and 6.

The fastener driving toolT of the present invention is a pneumatic operated tool or fastener driving device adapted to drive U-shaped'staples, it being understood that any type or configuration of fastener can be driven thereby, as required. However, the preferred type of fastener F is referred to above andthe tool T will be described so as to drive and clinch this particular fastener onto the particular netting as also hereinabove described.

The tool T, as illustrated in the drawings, is adapted to be handled manually and involves, generally, a frame A having a body portion and a handle or grip portion, a head B carried 'by the frame A and adapted to direct fasteners into a piece of work, a magazine C for handling a supply of fasteners such as staples and cooperating with the head B so that the staples are received and handled by the head, a driver blade D, a latching means F adapted to cooperate with and control operation of the driver 'blade D, a piston G operable in a cylinder in the frame A and adapted to drive the blade D, a coupler and snubber H operatively joining the driver blade D and piston G, and valve means I adapted to control the supply of fluid under pressure to actuate the piston G through a work stroke and a return stroke.

The frame A carries the various elements of the tool, and is shaped to be conveniently handled by a person. The body portion of the frame is a simple elongate part having a cylinder extending longitudinally thereof and having an opening or passage extending longitudinally at the lower end of the cylinder, and has a recess at the opening for receiving .and

positioning the head B. The handle or grip portion of the frame is provided to give the person handling the tool a convenient means to'hold the tool T and is a simple grip of ordinary construction that projects fromthe body. In practice, the grip may be substantially normal to the axis of the body and may project therefrom as clearly shown in FIG. 1 of the drawings.

In structures of the type under consideration, it is.

common practice to provide a fluid pressure supply connection 20 at the grip. It is to be understood that any suitable fluid pressure supply can be provided without affecting the present invention. In the case illustrated the hose of the pressure connection is attached to the grip through a quick disconnect and the valve means J 15 under control of a finger operated trigger 21.

The head B is, in effect, an extension of the body of the frame A and is provided to receive and deliver fasteners such as staples to the work being acted upon by the tool. the body in the recess provided therefor and with a longitudinal vertically disposed guideway 22 that extends through and opens at its top and bottom ends.

The head B has a front face 23 in which a channel is formed in order to establish the guideway 22, it has a cover plate 24 engaged with the face 23 to close the channel, and it has a lower end face 25. It will be apparent how the guideway 22 can be proportioned so that it will readily pass the staples F with clearance and will act upon the staples to guide them as they are delivered through the head B and from the tool. The guideway. 22 also guides. the driver blade D of the tool as well :as the staples F that are handled thereby. Spaced fasteners 27, one at each side of the head B, secure the head to the body of the tool and secure the plate 24 to the head. ltiwill be apparent that the plate 24 in working position presents a completely flat area at the front of the tool and closely adjacent to the guideway 22.

A fastener or staple receiving opening 32 extends laterally through the body A and head B, which opening enters through the head and opens into the guideway, 22

so that the staples F fed to the head B are properly guided by the driver blade D of the mechanism. The opening 32 is shaped substantially the same as the staple configuration in order to pass the staples, as shown.

The magazine C is adapted to handle a supply or stack of fasteners or U-shaped staples F and involves, generally, a case 35'carried by the frame A, a guide 36 within the case 35, a follower 37 adapted to advance the fasteners or staples, and a feed spring 38 yieldingly urging the follower toward the head B. The case 35 is carried by the body of the frame A'and is an elongate part that projects laterally therefrom. The case is shell-like in form and the guide 36 is a core-like part that is coextensive with the case 35 and is carried between the side walls thereof. A longitudinal passage 40 is formed by the case 35 which passage conforms in general configuration to the U-shaped staples F with their looped portions B.

The guide 36 enters the fastener or staple zreceiving. opening 32 and terminates in a flat end 39 thatoccurs. in the plane of the bottom wall of the guideway 22. The

follower 37 conforms with the configuration of and is slidably carried in the passage 40 and is yieldingly urged toward the head B by the feed spring 38. Meansis provided to prevent the follower 37 from entering the guide-. 6

part rectangular in cross-sectional configuration and ten;

minates at its forward end in a fiat fastener or staple driving face 45. The blade D occupies the guideway 22 of the head B and has an upper driven portion which couples with and to have driving engagement with the piston G. The face 45 is engageable with the spaced 17 of the fastener, there being a recess 47 at the center of the face 45 to accommodate and to clear the loop portion 18.

The latching means F that may be employed in tools of the type under consideration is adapted to cooperate with and control operation of the piston G, later de- The head B is a fiat plate-like partcarried by scribed. The means F is provided to couple with and to hold the piston G at the upper end of the cylinder and to release the piston G when sufiicient fluid pressure has been established in the cylinder to effect the desired work stroke. The latching means F may involve suitable mechanism to carry out the function referred to without affecting the present invention. For example, the latching means F may involve means adapted to releasably couple to a head 57 that projects from the top of the piston G, and a pressure responsive release means 58 adapted to release the head 57 from the upper end of the cylinder. The upper end of the cylinder remote from the head B is closed by a cap 59, the latching means F being threadedly engaged through an opening in the cap for adjustment.

The piston G operates in the cylinder and has driving engagement with the driver blade D. The piston G is adapted to drive or move the driver blade D forwardly or downwardly and isv adapted to be damped or snubbed. The cylinder is incorporated in the body of the frame A on the longitudinal axis thereof, and is supplied with fluid under pressure by the valve means I, as hereinafter described. The piston G is freely carried in the cylinder and is actuated to retract and to advance in the cylinder. In the particular tool illustrated throughout the drawings the ordinary compression return spring is eliminated which is usually provided within the cylinder ahead of the piston G to return the piston to a retracted position. The tool illustrated is operated entirely by fluid pressure so that when the trigger 21 of the tool is operated the piston G is moved to the bottom of the cylinder, and so that when the trigger 21 is released the piston G is moved to the top of the cylinder.

The piston G is characterized by upper and lower portions 65 and 66 of different diameter establishing a chamber 60 therebetween. The piston G occupies the interior of the cylinder which is also characterized by upper and iower bores 62 and 63 of different diameters. The return means of the tool involves the provision of said differing diameters and further involves the provision of a pressure supply in communication with the cylinder between the upper and lower portions of the piston G. The pressure supply is a valve means that allows fluid to flow in one direction only and checks the flow of fluid in the other direction so that fluid pressure applied to the cylinder above and piston G is directed to the chamber 69 and is retained in the chamber 60 by action of the valve of the pressure supply. In the case illustrated, the valve element 102 is an elastic band of rubber that encircles the piston G and which is constricted onto a seat having a part in communication with the cylinder above the piston (not shown). In practice the bank forming the valve element 102 is circular in cross section and in the form of an O ring sealing ring, and in which case the said seat is arcuate in form to cooperate with the inner diameter of the element 102. It will be apparent how the O ring shaped valve element 102 seals fluid under pressure in the chamber 60.

The valve means I is a fluid pressure supply and exhaust means that admits and exhausts operating fluid to and from the top end of the cylinder hereinabove described. The valve means I is preferably formed in and carried by the frame A of the tool and, as shown, is housed in the grip. \In the case illustrated, the valve means I involves a valve chest 85 and a slide 86 that is shiftably carried in the chest to control flow of fluid. As shown, the chest 85 extends through the grip to open at both the front and back thereof, there being a recess 88 at the front of the chest. The recesses 87 and 88 are in the form of counterbores, the recess 87 handling the inlet of fluid under pressure and the recess 88 handling the exhaust of fluid. A pressure supply passage 89 connects the recess 87 to the connection while the recess 88 simply opens to the outside atmosphere at the exterior of the grip.

The slide 86 of the valve means I is freely shiftable in the chest and involves a plunger 90 that is operable in the recess -88 and a valve disc 91 that is operable in the recess 87. A spring 92 is seated in a cap 93 that confines the spring to the recess 87, the spring engaging and yieldingly urging the disc 91 into contact with a seat in the recess. An extension 94 projects from the plunger 90 and is engaged by and operated by the trigger 21. When the valve means I is depressed by the trigger 21 the disc 91 is lifted fromthe seat allowing passage of fluid under pressure to a passage that is in communication with the upper end of the cylinder, while the plunger 9|] enters the chest 85 to close the exhaust recess 88. When the valve means I is released to the position shown in FIG. 4 the disc 91 is seated to close the recess 87 while the plunge-r 90 opens the recess 88 to exhaust fluid from the upper end of the cylinder.

When fluid under pressure is applied to the upper end of the cylinder the piston G moves downwardly and the chamber 60 is charged with fluid under pressure. At the end of the work stroke the piston G is arrested by the snubbe-r H in the form of a resilient cushion of rubber or the like. Upon release of fluid from the upper end of the cylinder the valve 102 operates to retain fluid under pressure in the chamber 60. The fluid that is employed to operate the piston G is air, or the like, which is elastic or compressible. The compressed fluid that is captured in the chamber 60 tends to expand and acts against the larger piston head 65 to move it upwardly to the position shown in FIG. 4.- V

In accordance with the invention 1 provide furring means X at the head B to lift articles from the surface to which they are to be attached and to place them at a predetermined height. Further, the fur-ring means X hold-s the articles in said predetermined position while the fastening operation is performed by the tool T, the fastener F being applied in such fashion as to maintain the positioning of the article. in the case of the stucconetting -N, any rod-like wire 10 thereof can be engaged andlifted by the furring means X; however, it has been found to be most practical to lift the roped portions 12. Therefore, the features of the tool to be described in this connection are proportioned to engage and to accommo date the pair of wires 10 which comp-rise the roped por- .tion 12. As shown, the furring means X involves, generally, a bearing plate 110, one or a pair of lifting cams 120 and cam extending means 130. V

The bearing plate is a flat element that is held to the cover plate 24 by a pair of fasteners 27. There is a spacer 111 to position the plate 110 parallel with the plate 24, so that a space is provided therebetween for accommodating the cam or cams 120. A feature of the invention is that the plate 110, although essentially coextensive with the plate 24, depends below the face 25 of head B, in this instance 4 inch or as may be required; Also, a feature of the invention is the formation of a recess 112 centrally located in the bearing plate 110, this recess being variable in formation as circumstances re quire. For instance and as shown in FIG. 11, it may be desirable to have but one cam in which case the recess 112 can be shaped in a one-sided fashion (half of the recess to be described). However, it is preferred to have a pair of cams 120 in Which case the recess 112 is formed with two convergent walls 113 and 114 that reach .a vertex at the plane or level of the lower end face 25 of the head B. These two walls 113 and 114 are operable as straight walls, each disposed at about 45 as shown.

The cams 120 are preferably provided in a pair as shown, in order that one may oppose the other in applying lifting action to the article to be raised. 'It is feasible to have but one cam 120, but it is preferred to have a pair of said cams for the reason that skill upon the part of the person operating the tool T is thereby minimized. As is shown, the cams 120 are spaced laterally on the 7 bearing plate 110 and normally depend from the plate at each side of the recess 112. Each cam 120 revolves on a pivot pin 121 on an axis normal to the plane of the plate and spaced outward from the walls 113 and 114 respectively. Each cam 1.20 has an article engaging inner face 122, a surface engaging lower face. 123 and a stop 124. As shown, the laterally spaced pins 121 extend between the bearing plate 110 and cover plate 24, where the two cams 120are carried and between which plates the said cams are retractable;

The cams 120 are alike and oppositely disposed, and when in a normal unactuated position as shown in FIGS. 1 and 7 the faces 122 and 123 converge to a point 125 spaced downwardly from the lower edge 11 of the hearing plate. Thus, a depending cam lobe is formed, the point 125 being positioned inwardly of the pin 121 and preferably directly beneath the lower extremity of the wall 113 or 114 as the case may be. As a result, it has been found to be practical to dispose the inner faces 122 parallel with each other and related normally to the edge 115. Further, the lower faces 123 extend outwardly and upwardly from the points 125 and to the pins 121, these and 114. As a result, the inner face 122 will underlie a the area of said vertex when the cam 120. is revolved to a position such as shown clearly in FIG. 9.

As clearly illustrated, there is but one space between plate 24 and'plate 110 and each cam 120 substantially occupies said space at one side of the structure, while each cam can underlie the vertex of walls 113 and 114. There fore, it is a feature that the points 125 be relatively sharp whereby one point will seek passage beneath the other, it being remotely possible for said points to exactly abut, and to-the end that the cam points normally pass each other and overlap as clearly shown in FIGS. 8 and 9. Furthermore, the sharpness of the points 125 assures facility of engagement under the wire or wires 10, and when the cams 120 are urged to revolve toward each other, by downward pressure of the tool T, the point 125 of one cam rides up upon the inner face 122 of the other cam, movement of the first mentioned cam being assisted by movement of the second mentioned cam.

The upwardly and outwardly disposed lower faces 123 of the cams are the faces which engage the surface into which the fastener is to be driven. This engagement is employed to revolve said cams inwardly toward each other, by rolling engagement with the convex surfaces of the faces 123. By providing convexity it is possible to lift the points 125 high into the recess 112 while the said convex faces 123 continue to depend below the edge 115 so as to engage the surface into which the. fastener is to be driven. As a result of engagement of one point 125 on the inner face 122 of the other cam 120, the wire or wires 10 are captured above the came points and are urged toward the vertex of walls 113 and 114, and the wire or wires 10 are stopped when they reach said vertex.

The stop 124 can vary widely and is shown as a lever which projects from the pin 121 in a direction opposite the extension of the faces 122 and 123. The stop limits downward and outward movement of the point 125. by engaging the spacer 111, as shown, but so that the cam 120 is free to revolve inwardlyas above described and shown.

The cam extending means 130 can vary widely and is shown as a spring means. Gravity can be employed for example. In the drawings I have shown a tension spring 131 that extends between the levers of the respective stops 124 to the end that the cams are yieldingly urged to the unactuated positions with the cams 120 are opened wide for reception of the wire or wires 10 therebetween. In order to actuate the cams the entire tool T is pressed into engagement with the surface into which the fasteners are to be driven, whereupon the convex faces 123 of the cams cause the revolvement of the cams as above described.

In accordance with the invention the fastener F of FIG;

3 is driven by the tool mechanism hereinabove described. The looped portion 18 is centered within the vertex area of walls 113 and 114, while the shoulder portions 17 are driven into engagement with the surface which the fastener shanks 15 penetrate. Thus, the loop 18 embraces the wire or wires 10 and it is preferred that the legs 19 have close or sliding, and even slightly interfering, engagement with the wire or wires 1t). Upon final driving of the fastener F the shoulder portions are forced into horizontal alignment with each other, and since the shanks 15 are positioned and anchored by penetration into the surface, the legs 19 are forced to be deflected inwardly as best illustrated in FIGS. 2c, 6 and 10. As a result of. this straightening of the shoulder portions 17 the legs.

19 cooperate to establish a V-relationship which has a wedging action that forces the wire or wires 10 upwardly to be tightly accommodated in the top of the loop 18 which embraces them.

From the foregoing it will be apparent that I have pro-.

vided features of constructions which are applicable to a wide variety of fastener driving tools, whereby articles.

of the type under consideration are furred away from the surface into which the fasteners are to be driven in order to secure the said article in spaced relationship to the said surface. It is a simple matter to manipulate such a tool T with the above described improvements, by simply pressing the tool against a surface in order to actuate the lifting elements which I have provided in the form of cams with sharpened points and with inner lifting faces 122. Upon manipulation and actuation of the article lifting structure hereinabove described, exact and predetermined positioning of said article is accomplished, followed by driving of a fastener into holding engagement with said article. Further, a minimum number of additional elements .are required'and each element is rugged and durable and to the end that the overall structure is practical. I

Having described only typical preferred forms and applications of my invention, I do not wish to be limited or restricted to the specific details herein set forth, but Wish to reserve to myself any modifications or variations that.

may appear to those skilled in the art and fall within the scope of the following claims.

Having described my invention, I claim:

1. A fastener driving tool having means at the head thereof for furring an article from t-he supporting surface to which it is to be afiixed, and including;

(a) a recess in apart at the head of the tool,

(b) a revolvable cam normally depending from the head of the tool and having a point to engage said supporting surface and to engage under the-said article,

(c) said cam having a flat inner face to engage said article and a convex outer face to engage said supporting surface, whereby depression of said tool against said supporting surface causes revolving of the cam to raise the inner face thereof and carry the article into the recess where the said article. is

held in spaced relationship with said supporting (b) a revolvable cam pivoted to said part laterally of said recess and normally depending from the head of the tool and having a point to engage said supporting surface and to engage under the said article, (c) said cam having a fiat inner face movable to underlie the vertex of said convergent walls and an underlying convex outer face to rollingly engage said supporting surface, whereby depression of said tool against said supporting surface causes revolving of the cam and movement of said article into the said vertex where the said article is held in spaced relationship with said supporting surface by the inner face of the cam,

(d) and means normally extending the cam beneath the head of the tool.

3. A fastener driving tool having means at the head thereof for furring an article from the supporting surface to which it is to be affixed, and including;

(a) a recess in a part at the head of the tool,

(b) a pair of revolvable cams normally depending from the head of the tool and each having a point to engage said supporting surface and to engage under the said article,

(c) each of said cams having a flat inner face to engage said article and a convex outer face to engage said supporting surface, whereby depression of said tool against said supporting surface causes revolving of the cam to raise the inner face thereof and carry the article into the recess where the said article is held is spaced relationship with said supporting surface,

(d) and means normally extending the cams beneath the head of the tool.

4. A fastener driving tool having means at the head thereof for furring an article from the supporting surface to which it is to be aflixed, and including;

(a) a recess having convergent walls formed in a part at the head of the tool,

(b) a pair of revolvable cams pivoted to said part laterally of said recess and normally depending from the head of the tool and each having a point to engage said supporting surface and to engage under the said article,

(c) each of said cams having an inner face movable to underlie the vertex of said convergent walls and an underlying convex outer face to rollingly engage said supporting surface, whereby depression of said tool against said supporting surface causes revolving of the cam and movement of said article into the said vertex where the said article is held in spaced relationship with said supporting surface by the inner face of the cam,

(d) and means normally extending the cams beneath the head of the tool.

5. A fastener driving tool having means at the head thereof for furring an article from the supporting surface to which it is to be affixed, and including;

(a) a recess in the lowermost face of a part extending transversely at the head of the tool,

(b) a pair of laterally spaced revolvable cams normally depending from the head of the tool and each having a point to engage said supporting surface and to engage under the said article,

(c) each of said cams having a flat inner face normally in spaced apposition to the other and to engage said article, and having a convex outer face to rollingly engage said supporting surface, whereby depression of said tool against said supporting surface causes revolving of the cams and whereby one point seeks passage beneath the other point and whereby the article is carried by one of said inner faces to be lifted into the recess and held in spaced relationship with said supporting surface by the inner face of one of said cams,

(d) and means normally extending the cams beneath the lowermost face of said part.

6. A fastener driving tool having means at the head thereof for furring an article from the supporting surface to which it is to be affixed, and including;

(a) a transverse bearing plate depending from the head of the tool, there being a recess centered in the lowermost face of said plate,

(b) a pair of revolvable cams on laterally spaced pivots and normally depending from the said plate and each having a point to engage said supporting surface and to engage under the said article,

(c) each of said cams having a flat inner face normally in spaced apposition to the other and to engage said article, and having a convex outer face to rollingly engage said supporting surface, whereby depression of said tool against said supporting surface causes revolving of the cams and whereby one point seeks passage beneath the other point and whereby the article is carried by one of said inner faces to be lifted into the recess and held in spaced relationship with said supporting surface by the inner face of one of said cams,

(d) and means normally extending the cams beneath the lowermost face of said part.

7. A fastener driving tool having means at the head thereof for furring an article from the supporting surface to which it is to be affixed, and including;

(a) a transversebearing plate spaced from and depending from the head of the tool, there being a recess centered in the lowermost face of said plate,

(b) a pair of revolvable cams on laterally spaced pivots intermediate the head of the tool and said bearing plate and normally depending from the said plate and each having a point to engage said supporting surface and to engage under the said article,

(c) each of said cams having a flat inner face normally in spaced apposition to the other end to engage said article, and having a convex outer face to rollingly engage said supporting surface, whereby depression of said tool against said supporting surface causes revolving of the cams and whereby one point seeks passage beneath the other point and whereby the article is carried by one of said inner faces to be lifted into the recess and held in spaced relationship with said supporting surface by the inner face of one of,

said cams,

(d) and means normally extending the cams beneath the lowermost face of said part.

8. A fastener driving tool for furring an article from a supporting surface to which it is aflixed by a fastener delivered by said tool, and including;

(a) means associated with the said tool to hold the said article in spaced relationship with the said supporting surface when the said tool is positioned to deliver a fastener,

(b) and means associated with a driver blade operated by the tool to propel a fastener into said supporting surface a limited distance and with a portion of said fastener projecting from the said supporting surface and in engagement with said article in said spaced relationship therewith.

9. A fastener driving tool for furring an article from a supporting surface to which it is aflixed by a fastener having a pair of shanks and head therebetween with inturned shoulders and a loop portion joining the shoulders, and including;

(a) means associated with the said tool to hold the said article in spaced relationship with the said supporting surface when the said tool is positioned to deliver a fastener,

(-b) and a driver blade operated by the tool and having a recess to accommodate the loop portion of the fastener and a drive face to engage and propel the shoulders of the fastener and thereby project the shanks into said supporting surface,

(c) whereby the shoulders limit the depth to which the fastener is delivered.

10. A fastener driving tool for furring an article from a supporting surface to which it is affixed by a fastener having a pair of shanks and head therebetween with inturned inclined shoulders and a loop portion with parallel sides joining the shoulders, and including;

(a) means associated with the said tool to hold the said article in spaced relationship with the said supporting surface when the said tool is positioned to deliver a fastener,

(b) and a driver blade operated by the tool and having a recess to accommodate the loop portion of the fastener and a straight drive face parallel with the supporting surface to engage and straighten and propel the shoulders of the fastener and thereby project the shanks into said supporting surface,

(c) whereby the shoulders are declined into alignment with each other when engaged with the supporting surface so as to cause the lower extremities of the 12 said sides of the loop portion to diverge upwardly and wedge the article therebetween in engagement with the top of the said loop portion.

References Cited by the Examiner GRANVILLE Y. CUSTER, JR., Primary Examiner. 

1. A FASTENER DRIVING TOOL HAVING MEANS AT THE HEAD THEREOF FOR FURRING AN ARTICLE FROM THE SUPPORTING SURFACE TO WHICH IT IS TO BE AFFIXED, AND INCLUDING; (A) A RECESS IN A PART AT THE HEAD OF THE TOOL, (B) A REVOLVABLE CAM NORMALLY DEPENDING FROM THE HEAD OF THE TOOL AND HAVING A POINT TO ENGAGE SAID SUPPORTING SURFACE AND TO ENGAGE UNDER THE SAID ARTICLE. (C) SAID CAM HAVING A FLAT INNER FACE TO ENGAGE SAID ARTICLE AND A CONVEX OUTER FACE TO ENGAGE SAID SUPPORTING SURFACE, WHEREBY DEPRESSION OF SAID TOOL AGAINST SAID SUPPORTING SURFACES CAUSES REVOLVING OF THE CAM TO RAISE THE INNER FACE THEREOF AND CARRY THE ARTICLE INTO THE RECESS WHERE THE SAID ARTICLE IS HELD IN SPACED RELATIONSHIP WITH SAID SUPPORTING SURFACE, (D) AND MEANS NORMALLY EXTENDING THE CAM BENEATH THE HEAD OF THE TOOL. 